Use the pH color scale. It shows acidity level of both acids and bases. You dip one of the pH strips into whatever liquid you choose, and then compare the new color of the pH strip to the colors on the scale. This will tell you the level of acidity. pH scale can be found below. As you can see, the brighter colors are more acidic than the darker and duller colors.
It helps break down waste and consume it as well as by eating dead organisms
Hope this helps :))
Answer:
the vaccine causes the immune system to produce antibodies to the virus that causes the measles
The answers is D because it needs something to survive
Cell membrane so you can think outside the box
